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<FONT color="green">001</FONT>    package com.google.code.guava.beans;<a name="line.1"></a>
<FONT color="green">002</FONT>    <a name="line.2"></a>
<FONT color="green">003</FONT>    import static com.google.common.base.Preconditions.checkArgument;<a name="line.3"></a>
<FONT color="green">004</FONT>    import static com.google.common.base.Preconditions.checkNotNull;<a name="line.4"></a>
<FONT color="green">005</FONT>    <a name="line.5"></a>
<FONT color="green">006</FONT>    import java.beans.PropertyDescriptor;<a name="line.6"></a>
<FONT color="green">007</FONT>    import java.lang.reflect.Field;<a name="line.7"></a>
<FONT color="green">008</FONT>    import java.lang.reflect.InvocationTargetException;<a name="line.8"></a>
<FONT color="green">009</FONT>    import java.lang.reflect.Method;<a name="line.9"></a>
<FONT color="green">010</FONT>    <a name="line.10"></a>
<FONT color="green">011</FONT>    import com.google.code.guava.base.Exceptions;<a name="line.11"></a>
<FONT color="green">012</FONT>    import com.google.code.guava.reflect.Classes;<a name="line.12"></a>
<FONT color="green">013</FONT>    import com.google.common.base.Function;<a name="line.13"></a>
<FONT color="green">014</FONT>    import com.google.common.base.Objects;<a name="line.14"></a>
<FONT color="green">015</FONT>    <a name="line.15"></a>
<FONT color="green">016</FONT>    /**<a name="line.16"></a>
<FONT color="green">017</FONT>     * This is an abstraction over a JavaBeans {@link PropertyDescriptor} (and the<a name="line.17"></a>
<FONT color="green">018</FONT>     * underlying field, if available). The generic type is equivalent to<a name="line.18"></a>
<FONT color="green">019</FONT>     * {@link PropertyDescriptor#getPropertyType()}.<a name="line.19"></a>
<FONT color="green">020</FONT>     * <a name="line.20"></a>
<FONT color="green">021</FONT>     * @param &lt;T&gt;<a name="line.21"></a>
<FONT color="green">022</FONT>     */<a name="line.22"></a>
<FONT color="green">023</FONT>    public class Property&lt;T&gt; extends BaseProperty&lt;T&gt;{<a name="line.23"></a>
<FONT color="green">024</FONT>    <a name="line.24"></a>
<FONT color="green">025</FONT>        enum PropertyToName implements Function&lt;PropertyDescriptor, String&gt;{<a name="line.25"></a>
<FONT color="green">026</FONT>    <a name="line.26"></a>
<FONT color="green">027</FONT>            INSTANCE{<a name="line.27"></a>
<FONT color="green">028</FONT>    <a name="line.28"></a>
<FONT color="green">029</FONT>                public String apply(final PropertyDescriptor input){<a name="line.29"></a>
<FONT color="green">030</FONT>                    return input.getName();<a name="line.30"></a>
<FONT color="green">031</FONT>                }<a name="line.31"></a>
<FONT color="green">032</FONT>            }<a name="line.32"></a>
<FONT color="green">033</FONT>        }<a name="line.33"></a>
<FONT color="green">034</FONT>    <a name="line.34"></a>
<FONT color="green">035</FONT>        /**<a name="line.35"></a>
<FONT color="green">036</FONT>         * Does this property have a getter method?<a name="line.36"></a>
<FONT color="green">037</FONT>         */<a name="line.37"></a>
<FONT color="green">038</FONT>        @Override<a name="line.38"></a>
<FONT color="green">039</FONT>        public boolean isReadable(){<a name="line.39"></a>
<FONT color="green">040</FONT>            return getter != null;<a name="line.40"></a>
<FONT color="green">041</FONT>        }<a name="line.41"></a>
<FONT color="green">042</FONT>    <a name="line.42"></a>
<FONT color="green">043</FONT>        /**<a name="line.43"></a>
<FONT color="green">044</FONT>         * Does this property have a setter method?<a name="line.44"></a>
<FONT color="green">045</FONT>         */<a name="line.45"></a>
<FONT color="green">046</FONT>        @Override<a name="line.46"></a>
<FONT color="green">047</FONT>        public boolean isWriteable(){<a name="line.47"></a>
<FONT color="green">048</FONT>            return setter != null;<a name="line.48"></a>
<FONT color="green">049</FONT>        }<a name="line.49"></a>
<FONT color="green">050</FONT>    <a name="line.50"></a>
<FONT color="green">051</FONT>        /**<a name="line.51"></a>
<FONT color="green">052</FONT>         * Does this property have a backing field?<a name="line.52"></a>
<FONT color="green">053</FONT>         * <a name="line.53"></a>
<FONT color="green">054</FONT>         * @see #getField()<a name="line.54"></a>
<FONT color="green">055</FONT>         */<a name="line.55"></a>
<FONT color="green">056</FONT>        public boolean isBackedByField(){<a name="line.56"></a>
<FONT color="green">057</FONT>            return field != null;<a name="line.57"></a>
<FONT color="green">058</FONT>        }<a name="line.58"></a>
<FONT color="green">059</FONT>    <a name="line.59"></a>
<FONT color="green">060</FONT>        /**<a name="line.60"></a>
<FONT color="green">061</FONT>         * Provides a type safe generic view of this property. Usage:<a name="line.61"></a>
<FONT color="green">062</FONT>         * <a name="line.62"></a>
<FONT color="green">063</FONT>         * &lt;pre&gt;<a name="line.63"></a>
<FONT color="green">064</FONT>         * Property&lt;?&gt; someProperty = // initialize this somehow<a name="line.64"></a>
<FONT color="green">065</FONT>         * if(String.class.equals(someProperty.getType())){<a name="line.65"></a>
<FONT color="green">066</FONT>         *     someProperty.asType(String.class).setValue(bean, "Hello World");<a name="line.66"></a>
<FONT color="green">067</FONT>         * }<a name="line.67"></a>
<FONT color="green">068</FONT>         * &lt;/pre&gt;<a name="line.68"></a>
<FONT color="green">069</FONT>         * <a name="line.69"></a>
<FONT color="green">070</FONT>         * @param &lt;S&gt;<a name="line.70"></a>
<FONT color="green">071</FONT>         * @param targetType<a name="line.71"></a>
<FONT color="green">072</FONT>         *            the target class<a name="line.72"></a>
<FONT color="green">073</FONT>         * @return this property, casted to the supplied generic type<a name="line.73"></a>
<FONT color="green">074</FONT>         * @exception IllegalArgumentException<a name="line.74"></a>
<FONT color="green">075</FONT>         *                if the supplied type is not compatible with<a name="line.75"></a>
<FONT color="green">076</FONT>         *                {@link #getType()}<a name="line.76"></a>
<FONT color="green">077</FONT>         */<a name="line.77"></a>
<FONT color="green">078</FONT>        @SuppressWarnings("unchecked" /* checked at runtime */)<a name="line.78"></a>
<FONT color="green">079</FONT>        public &lt;S&gt; Property&lt;S&gt; asType(final Class&lt;S&gt; targetType){<a name="line.79"></a>
<FONT color="green">080</FONT>            checkArgument(targetType.isAssignableFrom(getType())<a name="line.80"></a>
<FONT color="green">081</FONT>                || Classes.equivalentWhenAutoBoxing(targetType,<a name="line.81"></a>
<FONT color="green">082</FONT>                    getType()),<a name="line.82"></a>
<FONT color="green">083</FONT>                    "Property %s is not compatible with return type %s",<a name="line.83"></a>
<FONT color="green">084</FONT>                    getName(),<a name="line.84"></a>
<FONT color="green">085</FONT>                    getType());<a name="line.85"></a>
<FONT color="green">086</FONT>            return (Property&lt;S&gt;) this;<a name="line.86"></a>
<FONT color="green">087</FONT>        }<a name="line.87"></a>
<FONT color="green">088</FONT>    <a name="line.88"></a>
<FONT color="green">089</FONT>        @Override<a name="line.89"></a>
<FONT color="green">090</FONT>        public int hashCode(){<a name="line.90"></a>
<FONT color="green">091</FONT>            return Objects.hashCode(name, field, getter, setter);<a name="line.91"></a>
<FONT color="green">092</FONT>        }<a name="line.92"></a>
<FONT color="green">093</FONT>    <a name="line.93"></a>
<FONT color="green">094</FONT>        @Override<a name="line.94"></a>
<FONT color="green">095</FONT>        public boolean equals(final Object obj){<a name="line.95"></a>
<FONT color="green">096</FONT>            if(obj instanceof Property&lt;?&gt;){<a name="line.96"></a>
<FONT color="green">097</FONT>                final Property&lt;?&gt; other = (Property&lt;?&gt;) obj;<a name="line.97"></a>
<FONT color="green">098</FONT>                return Objects.equal(name, other.name)<a name="line.98"></a>
<FONT color="green">099</FONT>                &amp;&amp; Objects.equal(field, other.field)<a name="line.99"></a>
<FONT color="green">100</FONT>                &amp;&amp; Objects.equal(getter, other.getter)<a name="line.100"></a>
<FONT color="green">101</FONT>                &amp;&amp; Objects.equal(setter, other.setter);<a name="line.101"></a>
<FONT color="green">102</FONT>            }<a name="line.102"></a>
<FONT color="green">103</FONT>            return false;<a name="line.103"></a>
<FONT color="green">104</FONT>        }<a name="line.104"></a>
<FONT color="green">105</FONT>    <a name="line.105"></a>
<FONT color="green">106</FONT>        private final Field field;<a name="line.106"></a>
<FONT color="green">107</FONT>        private final Method getter;<a name="line.107"></a>
<FONT color="green">108</FONT>        private final String name;<a name="line.108"></a>
<FONT color="green">109</FONT>        private final Method setter;<a name="line.109"></a>
<FONT color="green">110</FONT>        private final Class&lt;T&gt; type;<a name="line.110"></a>
<FONT color="green">111</FONT>    <a name="line.111"></a>
<FONT color="green">112</FONT>        @SuppressWarnings("unchecked")<a name="line.112"></a>
<FONT color="green">113</FONT>        Property(final PropertyDescriptor descriptor){<a name="line.113"></a>
<FONT color="green">114</FONT>            getter = descriptor.getReadMethod();<a name="line.114"></a>
<FONT color="green">115</FONT>            setter = descriptor.getWriteMethod();<a name="line.115"></a>
<FONT color="green">116</FONT>            name = descriptor.getName();<a name="line.116"></a>
<FONT color="green">117</FONT>            type = (Class&lt;T&gt;) descriptor.getPropertyType();<a name="line.117"></a>
<FONT color="green">118</FONT>    <a name="line.118"></a>
<FONT color="green">119</FONT>            final Method reference = getter == null ? setter : getter;<a name="line.119"></a>
<FONT color="green">120</FONT>            Field tmpField;<a name="line.120"></a>
<FONT color="green">121</FONT>            try{<a name="line.121"></a>
<FONT color="green">122</FONT>                tmpField = reference.getDeclaringClass()<a name="line.122"></a>
<FONT color="green">123</FONT>                .getDeclaredField(descriptor.getName());<a name="line.123"></a>
<FONT color="green">124</FONT>            }catch(final SecurityException e){<a name="line.124"></a>
<FONT color="green">125</FONT>                throw Exceptions.rethrow(e);<a name="line.125"></a>
<FONT color="green">126</FONT>            }catch(final NoSuchFieldException e){<a name="line.126"></a>
<FONT color="green">127</FONT>                // that's OK, there doesn't have to be a field<a name="line.127"></a>
<FONT color="green">128</FONT>                tmpField = null;<a name="line.128"></a>
<FONT color="green">129</FONT>            }<a name="line.129"></a>
<FONT color="green">130</FONT>            field = tmpField;<a name="line.130"></a>
<FONT color="green">131</FONT>        }<a name="line.131"></a>
<FONT color="green">132</FONT>    <a name="line.132"></a>
<FONT color="green">133</FONT>        /**<a name="line.133"></a>
<FONT color="green">134</FONT>         * Return the underlying field (if any).<a name="line.134"></a>
<FONT color="green">135</FONT>         * &lt;p/&gt;<a name="line.135"></a>
<FONT color="green">136</FONT>         * &lt;b&gt;Caveat:&lt;/b&gt; There is no way to determine the correlation between<a name="line.136"></a>
<FONT color="green">137</FONT>         * fields and accessors by reflection. By convention, a bean property is<a name="line.137"></a>
<FONT color="green">138</FONT>         * usually backed by a field of the same name and type, but this is not<a name="line.138"></a>
<FONT color="green">139</FONT>         * required, nor is there any special mechanism to retrieve such a field. In<a name="line.139"></a>
<FONT color="green">140</FONT>         * theory, there could be a field that has the correct name and type, but<a name="line.140"></a>
<FONT color="green">141</FONT>         * has nothing to do with this property. Sorry, we have no way to find out.<a name="line.141"></a>
<FONT color="green">142</FONT>         * <a name="line.142"></a>
<FONT color="green">143</FONT>         * @return the underlying field, or null<a name="line.143"></a>
<FONT color="green">144</FONT>         */<a name="line.144"></a>
<FONT color="green">145</FONT>        public Field getField(){<a name="line.145"></a>
<FONT color="green">146</FONT>            return field;<a name="line.146"></a>
<FONT color="green">147</FONT>        };<a name="line.147"></a>
<FONT color="green">148</FONT>    <a name="line.148"></a>
<FONT color="green">149</FONT>        /**<a name="line.149"></a>
<FONT color="green">150</FONT>         * Get the value of the underlying field. Throws a<a name="line.150"></a>
<FONT color="green">151</FONT>         * {@link NullPointerException} if there is no field, so use<a name="line.151"></a>
<FONT color="green">152</FONT>         * {@link #isBackedByField()} first.<a name="line.152"></a>
<FONT color="green">153</FONT>         * <a name="line.153"></a>
<FONT color="green">154</FONT>         * @param bean<a name="line.154"></a>
<FONT color="green">155</FONT>         *            a bean that has this property<a name="line.155"></a>
<FONT color="green">156</FONT>         * @see #isBackedByField()<a name="line.156"></a>
<FONT color="green">157</FONT>         */<a name="line.157"></a>
<FONT color="green">158</FONT>        @SuppressWarnings("unchecked")<a name="line.158"></a>
<FONT color="green">159</FONT>        public T getFieldValue(final Object bean){<a name="line.159"></a>
<FONT color="green">160</FONT>            try{<a name="line.160"></a>
<FONT color="green">161</FONT>                checkNotNull(field, "Field not defined");<a name="line.161"></a>
<FONT color="green">162</FONT>                field.setAccessible(true);<a name="line.162"></a>
<FONT color="green">163</FONT>                return (T) field.get(bean);<a name="line.163"></a>
<FONT color="green">164</FONT>            }catch(final IllegalArgumentException e){<a name="line.164"></a>
<FONT color="green">165</FONT>                throw Exceptions.rethrow(e);<a name="line.165"></a>
<FONT color="green">166</FONT>            }catch(final IllegalAccessException e){<a name="line.166"></a>
<FONT color="green">167</FONT>                throw Exceptions.rethrow(e);<a name="line.167"></a>
<FONT color="green">168</FONT>            }<a name="line.168"></a>
<FONT color="green">169</FONT>        };<a name="line.169"></a>
<FONT color="green">170</FONT>    <a name="line.170"></a>
<FONT color="green">171</FONT>        /**<a name="line.171"></a>
<FONT color="green">172</FONT>         * Get the getter method, if available. Call {@link #isReadable()} to see if<a name="line.172"></a>
<FONT color="green">173</FONT>         * a getter is available.<a name="line.173"></a>
<FONT color="green">174</FONT>         * <a name="line.174"></a>
<FONT color="green">175</FONT>         * @return the getter method, or null<a name="line.175"></a>
<FONT color="green">176</FONT>         * @see #isReadable()<a name="line.176"></a>
<FONT color="green">177</FONT>         */<a name="line.177"></a>
<FONT color="green">178</FONT>        public Method getGetter(){<a name="line.178"></a>
<FONT color="green">179</FONT>            return getter;<a name="line.179"></a>
<FONT color="green">180</FONT>        };<a name="line.180"></a>
<FONT color="green">181</FONT>    <a name="line.181"></a>
<FONT color="green">182</FONT>        /**<a name="line.182"></a>
<FONT color="green">183</FONT>         * Return the bean property name. According to the JavaBeans convention,<a name="line.183"></a>
<FONT color="green">184</FONT>         * this name will be &lt;code&gt;foo&lt;/code&gt; if<a name="line.184"></a>
<FONT color="green">185</FONT>         * &lt;ul&gt;<a name="line.185"></a>
<FONT color="green">186</FONT>         * &lt;li&gt;{@link #getGetter()} returns a method called either<a name="line.186"></a>
<FONT color="green">187</FONT>         * &lt;code&gt;getFoo()&lt;/code&gt; or &lt;code&gt;isFoo()&lt;/code&gt; (the latter is valid for<a name="line.187"></a>
<FONT color="green">188</FONT>         * boolean properties only)<a name="line.188"></a>
<FONT color="green">189</FONT>         * &lt;li&gt;and / or {@link #getSetter()} returns a method called<a name="line.189"></a>
<FONT color="green">190</FONT>         * &lt;code&gt;setFoo()&lt;/code&gt;<a name="line.190"></a>
<FONT color="green">191</FONT>         * &lt;/ul&gt;<a name="line.191"></a>
<FONT color="green">192</FONT>         * This name can never be null or empty, and it will only contain valid java<a name="line.192"></a>
<FONT color="green">193</FONT>         * identifier characters as identified by<a name="line.193"></a>
<FONT color="green">194</FONT>         * {@link Character#isJavaIdentifierPart(char)}.<a name="line.194"></a>
<FONT color="green">195</FONT>         */<a name="line.195"></a>
<FONT color="green">196</FONT>        @Override<a name="line.196"></a>
<FONT color="green">197</FONT>        public String getName(){<a name="line.197"></a>
<FONT color="green">198</FONT>            return name;<a name="line.198"></a>
<FONT color="green">199</FONT>        }<a name="line.199"></a>
<FONT color="green">200</FONT>    <a name="line.200"></a>
<FONT color="green">201</FONT>        /**<a name="line.201"></a>
<FONT color="green">202</FONT>         * Get the setter method, if available. Call {@link #isWriteable()} to see<a name="line.202"></a>
<FONT color="green">203</FONT>         * if a setter is available.<a name="line.203"></a>
<FONT color="green">204</FONT>         * <a name="line.204"></a>
<FONT color="green">205</FONT>         * @return the setter method, or null<a name="line.205"></a>
<FONT color="green">206</FONT>         * @see #isWriteable()<a name="line.206"></a>
<FONT color="green">207</FONT>         */<a name="line.207"></a>
<FONT color="green">208</FONT>        public Method getSetter(){<a name="line.208"></a>
<FONT color="green">209</FONT>            return setter;<a name="line.209"></a>
<FONT color="green">210</FONT>        }<a name="line.210"></a>
<FONT color="green">211</FONT>    <a name="line.211"></a>
<FONT color="green">212</FONT>        /**<a name="line.212"></a>
<FONT color="green">213</FONT>         * Gets the property value by invoking the getter. Throws<a name="line.213"></a>
<FONT color="green">214</FONT>         * {@link NullPointerException} if no getter exists, so check<a name="line.214"></a>
<FONT color="green">215</FONT>         * {@link #isReadable()} before accessing this.<a name="line.215"></a>
<FONT color="green">216</FONT>         */<a name="line.216"></a>
<FONT color="green">217</FONT>        @SuppressWarnings("unchecked")<a name="line.217"></a>
<FONT color="green">218</FONT>        public T getValueFromGetter(final Object bean){<a name="line.218"></a>
<FONT color="green">219</FONT>            try{<a name="line.219"></a>
<FONT color="green">220</FONT>                checkNotNull(getter, "Getter not defined");<a name="line.220"></a>
<FONT color="green">221</FONT>                return (T) getGetter().invoke(bean);<a name="line.221"></a>
<FONT color="green">222</FONT>            }catch(final IllegalArgumentException e){<a name="line.222"></a>
<FONT color="green">223</FONT>                throw Exceptions.rethrow(e);<a name="line.223"></a>
<FONT color="green">224</FONT>            }catch(final IllegalAccessException e){<a name="line.224"></a>
<FONT color="green">225</FONT>                throw Exceptions.rethrow(e);<a name="line.225"></a>
<FONT color="green">226</FONT>            }catch(final InvocationTargetException e){<a name="line.226"></a>
<FONT color="green">227</FONT>                throw Exceptions.rethrow(e);<a name="line.227"></a>
<FONT color="green">228</FONT>            }<a name="line.228"></a>
<FONT color="green">229</FONT>    <a name="line.229"></a>
<FONT color="green">230</FONT>        }<a name="line.230"></a>
<FONT color="green">231</FONT>    <a name="line.231"></a>
<FONT color="green">232</FONT>        public void setFieldValue(final Object bean, final T value){<a name="line.232"></a>
<FONT color="green">233</FONT>            try{<a name="line.233"></a>
<FONT color="green">234</FONT>                field.setAccessible(true);<a name="line.234"></a>
<FONT color="green">235</FONT>                checkNotNull(field, "Field not defined");<a name="line.235"></a>
<FONT color="green">236</FONT>                field.set(bean, value);<a name="line.236"></a>
<FONT color="green">237</FONT>            }catch(final IllegalArgumentException e){<a name="line.237"></a>
<FONT color="green">238</FONT>                throw Exceptions.rethrow(e);<a name="line.238"></a>
<FONT color="green">239</FONT>            }catch(final IllegalAccessException e){<a name="line.239"></a>
<FONT color="green">240</FONT>                throw Exceptions.rethrow(e);<a name="line.240"></a>
<FONT color="green">241</FONT>            }<a name="line.241"></a>
<FONT color="green">242</FONT>        }<a name="line.242"></a>
<FONT color="green">243</FONT>    <a name="line.243"></a>
<FONT color="green">244</FONT>        public void setValueWithSetter(final Object bean, final T value){<a name="line.244"></a>
<FONT color="green">245</FONT>            try{<a name="line.245"></a>
<FONT color="green">246</FONT>                checkNotNull(setter, "Setter not defined");<a name="line.246"></a>
<FONT color="green">247</FONT>                setter.invoke(bean, value);<a name="line.247"></a>
<FONT color="green">248</FONT>            }catch(final IllegalArgumentException e){<a name="line.248"></a>
<FONT color="green">249</FONT>                throw Exceptions.rethrow(e);<a name="line.249"></a>
<FONT color="green">250</FONT>            }catch(final IllegalAccessException e){<a name="line.250"></a>
<FONT color="green">251</FONT>                throw Exceptions.rethrow(e);<a name="line.251"></a>
<FONT color="green">252</FONT>            }catch(final InvocationTargetException e){<a name="line.252"></a>
<FONT color="green">253</FONT>                throw Exceptions.rethrow(e);<a name="line.253"></a>
<FONT color="green">254</FONT>            }<a name="line.254"></a>
<FONT color="green">255</FONT>        };<a name="line.255"></a>
<FONT color="green">256</FONT>    <a name="line.256"></a>
<FONT color="green">257</FONT>        @Override<a name="line.257"></a>
<FONT color="green">258</FONT>        public Class&lt;T&gt; getType(){<a name="line.258"></a>
<FONT color="green">259</FONT>            return type;<a name="line.259"></a>
<FONT color="green">260</FONT>        }<a name="line.260"></a>
<FONT color="green">261</FONT>    <a name="line.261"></a>
<FONT color="green">262</FONT>    <a name="line.262"></a>
<FONT color="green">263</FONT>    }<a name="line.263"></a>




























































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